"$200 from Elton" joke

Elton goes to his friend's house, rings the bell, and the wife answers the door.
"Hi, is Gilbert home?"
"No he went to the store."
"Well, do you mind if I wait?"
"No come in."
They sit down and Elton says, "You know Nora, you have the greatest breasts
I have ever seen. I'd give you a hundred bucks if I could just see one".
Nora thinks about this for a second and figures what the hell - it'a a
hundred bucks, after all! She opens her robe and shows him one.

He promptly thanks her and throws a 100 bucks on the table. They sit there
a while longer and Elton says "They're so beautiful I gotta see the both of
them. I'll give you another 100 bucks if I could just see both of them
together."
Again, Nora thinks about this, then decides what the hell and opens her robe
to give Elton a nice long look. Elton thanks her and throws another 100
bucks on the table, then says he can't wait any longer for Gilbert and leaves.

Awhile later Gilbert arrives home and his wife says, "You know your weird
friend Elton came over." Gilbert says, "Great! Did he drop off the 200
bucks he owes me?"